Drop-hammer



A, ZAWADA.

DROP HAMMER.

APPLICATION- FILED JUNE 18, my.

lllhllTEl) STATES PATENT ()FFECE.

ALEX ZAWADA, 0F REMBRANDT, MANITOBA, CANADA.

DROP-HAMMER.

To all whom, it may concern:

Be it known that l, ALEX ZAWADA, a citizen of Ruthenia, residing atRembrandt, Province of Manitoba, Dominion of Canada, have inventedcertain new and useful improvements in Drop-lammers, of which thefollowing is a specification.

This invention has for its object the provision of a drop hammer adaptedto be pedally operated and in which the tup or hammer element isadjustable in a novel manner with relation to the anvil or die -block.

This and other objects are attained by the novel construction. andcombination of parts hereinafter described and shown in the accompanyingdrawings, forming amateria part of this disclosure, and in which Figurel is vertical sectional vi w taken through a hammer made in accordancewith the invention.

Fig. 2 is top plan iew thereof, and

l? 3 is a per ective view showing the sliding tup or hammer element.

Referring to the drawings in detaihthe numeral l0 indicates the base or"the harm mer from which rises a column 11, having an extending vert"-=lguide portion 12, at its side, the same being in alinernent with anundercut t insverse recess 14:, formed in the a vil element 15,immediately above base d'which contains a slide carrying a die 17.

Mounted to turn freely on a pin 18, set in a recess 19., in the lowerportion of the base, is lever 20, having a curved forward projectingportion 21 adapted to receive the foot oi the operator, the lever havingupon its upper sir-" ace a lug 22, in which is se cu ed the lower end ora cable 23, passing over l pulley mounted upon a pin set tr nsverse. inan open recess 2o, 1 f U 1 iorineo. in ht ll, exteds s, the i' to therim a pulley 28, mounted on a spindle 29, passing transversely throughthe opening 27 the top of the column 11.

Also secured upon the spindle 29 is another, sh pulley 30, to the rim ofwhich is attached one end of the heavier cable 31, en ged at its lowerend in a rec- D-UU u u tangular bar 32 slidably engaged 1n an nedcentrally in the elon ated o'eenino t3 1 .Lp r: 4- Q upper end or a sltup U3, having 1ongitudinal Vshaped elements 3e upon its op-Specification of Letters Patent.

Patented Apr. 20, 1920.

Application filed Jun 18, 1919. Serial No. 305,046.

posits sides suited to be received in "J-SllElPSCl grooves 35, formed inthe front portion 12 of the column, the same being machined so that theslides of the tup 34: will move freely therein.

Formed transversely through the bar 2-32 are a plurality of rectangularopenings 36, receptive of a square pin 37, passing through the tup nearits upper end and at right angles to the slide elements 34. This squarepin passes outward through a slot 3!", formed in the column 12, wherebyit is provided with an operating head 38 by which it my be withdrawn.

In order to hold the square pin 37 against accidental displacement, aflat spring 39 is held by rivets 40 to the tup 3-3, and is arranged toexert frictional pressure against the extending lower surface of the pin37, whereby it is held in any desired adjust ment.

Extending downward from the tup is usual form of punch holder ell,provided with a screw 42, for securing the punches therein.

ln operation, the parts having been assembled in the position asindicated, and the operator accustomed to a certain movement of thetreadle or lever 21 in operating the hammer, should it be desired to exert a relatively light blow, the square bar 32 is adjusted so that themovement transmitted throu h the le 'er and cable actuates the tup arelative small amount only, while on the contrary, if it be desired todeliver a heavier blow, the bar 32 is inserted to a greater lengthwithin the tup so that the latter is caused to move through a greater ofaction upon an equivalent movement of the lever 21.

Having thus described my invention what claim as new and desire tosecure by Letters Patent, is-

l. In a drop hammer, the combination with the frame thereof, a treadlever pivoted in the lower portion of said frame, a cable connectedtherewith, a spindle mounted transversely to said frame at the upper endthereof, pulleys engaged on said spindle, said cable being secured toone of said pulleys, another cable engaged with the other of saidpulleys, a tup slidably mounted in said frame, said cable being engagedwith said tup, of means for adjusting the movement communicated to saidtup by said pedal lever.

2. In a drop hammer, the combination With a base, a column risingtherefrom, and a pair of pulleys journaled in the upper portion of saidcolumn; of a foot lever journaled in said base, flexible connectionsbetween said foot lever and (meet said pulleys, a tup slidable in saidcolumn, said tup having a rectangular axial opening in the upper end, abar slidably engaged in the opening of said tup, means for adjustingsaid bar Within said tup, and flexible conneetions between said bar andthe other pulley.

In a drop hammer the combination with a frame, a spindle in said frame,pullevs en a ed on said s indle a treadle and a tup slidably arrangedtherein, of a bar adapted to slide in said trip, said bar havingtransverse openings, a pin passing through; i said tup and openlngs intosaid bar Where-- In testimony whereof E have atfixed my signature.

ALEX. ZAWADA.

